Broken axle extractor



April 13, 1937. v J, K SCHAEFER 2,077,268

BROKEN AXLE EXTRACTOR Filed May 1, 1934 Patented Apr. 13, 1937 UNITED STATES rivrlaii'r OFFICE! Claims.

The present invention relates generally to improvements in extracting tools and has particular reference to an extractor especially designed 'for use in extracting broken motor vehicle axles.

5 The principal object of the invention is to provide an extractor of the class designated which embodies circular gripping jaws adapted to enter the grease container man automobile housing to eiectively remove broken axle stubs without the removal or destruction of the grease container.

Another object of the invention is to provide an extractor having two arcuate jaws, one stationary and the other movable relative to the stationary jaw and employing means for opening the movable jaw to fit axles of varying diameters.

A further object of the invention is to provide an extractor having a head, a fixed jaw arranged in the head and a movable jaw adapted to be expanded relative to said iixed jaw, and means for actuating the movable jaw comprising rotatable elements including a pinion and a rack carried by the movable jaw andmeshing with said pinion.

A still further object of the invention is to provide an extractor having a movable jaw that may be tightened or released while the extractor head is positioned within the motor vehicle difierential housing.

An additional object is to provide an extractor having a xed jaw and a movable jaw, the movable jaw of which is provided with guides entering the fixed jaw and adapted to maintain said movable jaw in alignment at all times with the xed jaw oi the device.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this specication and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a side elevation of my improved extractor showing the movable jaw slightly expanded relative to the xed jaw of the device,

and

Fig. 2 is a longitudinal sectional view of the entire extractor showing the fixed jaw and the movable jaw, the operating handle, rod pinion and rack, also the guide members carried by the movable jaw.

The improved extractor consists in detail of an operating handle I, an elongated hollow sleeve 2, and a head 3. 'Ihe sleeve 2 is screwed to head 3 at one end and at its other end is screwed to handle I, said sleeve being held in the handle by means of a groove into 'which the ends of set screws extend so that the handle may be turned relative to the sleeve 2 and head 3.

The pinion rod 4 extends through the sleeve bore and is tapped into the handle and provided with a lock nut to securely hold the same in place therein and to also provide for longitudinal adjustment of said rod. The opposite end of vthe rod 4 is provided with a pinion 5 machined directly in said rod, as clearly shown in Figure 2. 10 A toothed rack 6 meshes with this pinion and said rack is tted tightly into the movable jaw 'l and provides means for expanding orrcontracting said movable jaw relative to the fixed jaw 8 which jaw extends from the head 3, said xed 15 jaw having an opening therein toallow the rack end to slide relative to said jaw. The movable jaw 'I is also provided with guide pins 9 and I0 slidable into openings provided in the xed jaw, said guide pins providing means for always main- 20 taining parallelism between the stationary and movable jaw. The movable jaw l and the xed jaw 8 of the device are provided, respectively, with case hardened blades II and I2 and these blades are arcuate in shape and are provided with serrated inner axle gripping sections adapted to securely grip the broken shaft to be pulled, said blades being slightly tapered toward each other, as clearly indicated in the figures.

The operation of the device is as fo1lows:- 30

The j-aW 1 of the extractor is expanded relative to the fixed jaw 8 by holding the sleeve 2 and head 3 stationary and then turning the handle I in a counter clockwise direction which rotational movement is imparted to rod 4 and pinion 35 5 and transmitted to rack 6 which rack being secured to movable jaw 'l causes said jaw to be moved outwardly away from fixed or stationary jaw 8. The jaw 1 is, of course, retracted by turning the handle I in a clockwise direction. 'I'he 40 movement of the jaw 'I is guided by the guides 9 and I0 as hereirrbefore explained.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and 45 that various changes relative to the material, size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims. 50

1. In a device of the class described, a circular head, a sleeve fitted into said head, a fixed jaw carried by said head and embodying an arcuate segment,-a movable jaw oi like formation slid.- 55

able relative to said fixed jaw, a rack mounted in said movable jaw, guide pins carried by said movable jaw and extending into said fixed jaw, an operating rod extending through said sleeve and having a pinion meshing with said rack, and an operating handle fixedly mounted on said rod and adapted to impart rotational movement to said pinion to actuate said movable jaw relative to said fixed jaw.

2. In an extracting tool of the class described, a circular headhaving a fixed jaw extending therefrom, a movable jaw cooperating with said fixed jaw, pin guides carried by said movable jaw and extending into said xed jaw to maintain parallelism between said jaws, and means for actuating said movable jaw relative to said xed Jaw, said xed and movable jaws comprising arcuate segments capable of gripping and removing -a broken axle. v

3. In an extracting tool of the class described, a circular head having a fixed jaw extending therefrom, a movable jaw arranged to cooperate with said xed jaw, pin guides carried by said movable jaw and extending into said xed jaw, said jaws having toothed extensions of segmental character and tapering inwardly toward each other, and means for actuating said movable jaw.

4. An extracting device of the class described embodying a circular. head including a fixed gripping jaw and a movable gripping jaw, .pin guides carried by said movable jaw, said jaws embodying extension blades tapered inwardly toward each other and internally serrated, and means for actuating said movable jaw relative to the xed jaw thereof, said means embodying an actuating handle and a sleeve fitted into said fixed jaw and arranged in co-axial alignment with said jaws.

5. In a pulling device,A of the class described, a longitudinal head, a longitudinal sleeve fitted into said head, a longitudinal fixed jaw carried by said head, a longitudinal movable jaw slidable laterally relative to said head, a perpendicular rack mounted in said longitudinal movable jaw, a longitudinal pinion rod inside of said longitudinal sleeve and extending the entire length of the sleeve and having a longitudinal pinion on said longitudinal pinion rod directly meshing with said perpendicular rack, and a rotatable operating handle directly xedly mounted on said pinion rod whereby perpendicular rotational movement imparted to said longitudinal handle directly causes the expansion and contraction of said longitudinal movable jaw relative to said longitudinal fixed jaw.

JOSEPH K. SCHAEFER. 

